Hi there, i need to controll with the pwm of i arduino drilling machine. I found this schematic and like to build it. will it work as i thought? can i controll the power from 0-100 %? Laurin
That looks like it needs synchronous triggering half-cycle-by-half-cycle to give control of a universal motor. Some (isolated) way of synchronizing to the mains zero-crossings is needed I think.
Is the motor a universal one? You can't use a triac circuit like that on highly inductive induction motors....
It does say on the diagram that it performs its own zero detection. Unsynchronised PWM would probably work poorly with that component.
Use S208T02 for optotriac driver.